Police find gun in patient's artificial leg Sydney's St Vincent's Hospital went into lockdown yesterday as police investigated a patient with a gun hidden in his artificial leg.

The concerns were first raised when a doctor called police saying there was a gun in a 66-year-old patient's room.

Police were called and the hospital was locked down while officers investigated.

When they arrived at the level nine room, they found the man, his 18-year-old son, and the son's 23-year-old girlfriend.

The gun was found in a stocking covering the patient's prosthetic leg.

The man's son and girlfriend were found to have two bullets for the gun.

The 66-year-old and the 18-year-old have been charged with illegally possessing a gun and ammunition and the 23-year-old woman has been charged with possessing ammunition.